{"title":"Structural Parameters of Ion Coordination in Aqueous Solutions of Cerium Nitrate According to the X-Ray Diffraction Analysis","authors":"P. R. Smirnov, O. V. Grechin","doi":"10.1134/S0022476624070096","DOIUrl":null,"url":null,"abstract":"<p>Based on the experimental data of the X-ray diffraction analysis, radial distribution functions are calculated in a wide concentration range of aqueous cerium nitrate solutions under standard conditions. Different models of the structural organization of systems are elaborated. By the calculation of theoretical functions for each model and their comparison with the experimental ones the optimal variants are revealed. Quantitative characteristics of the structure of the nearest environment of Ce<sup>3+</sup> and <span>\\(\\text{NO}^{-}_3\\)</span> ions, such as coordination numbers and interparticle distances, are determined along with the types of ionic pairs. The structure of the saturated solution is found to be governed by non-contact ion triples. A decrease in the concentration leads to their transformation into ionic pairs.</p>","PeriodicalId":668,"journal":{"name":"Journal of Structural Chemistry","volume":"65 7","pages":"1387 - 1394"},"PeriodicalIF":1.2000,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Structural Chemistry","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S0022476624070096","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
Based on the experimental data of the X-ray diffraction analysis, radial distribution functions are calculated in a wide concentration range of aqueous cerium nitrate solutions under standard conditions. Different models of the structural organization of systems are elaborated. By the calculation of theoretical functions for each model and their comparison with the experimental ones the optimal variants are revealed. Quantitative characteristics of the structure of the nearest environment of Ce3+ and \(\text{NO}^{-}_3\) ions, such as coordination numbers and interparticle distances, are determined along with the types of ionic pairs. The structure of the saturated solution is found to be governed by non-contact ion triples. A decrease in the concentration leads to their transformation into ionic pairs.
期刊介绍:
Journal is an interdisciplinary publication covering all aspects of structural chemistry, including the theory of molecular structure and chemical bond; the use of physical methods to study the electronic and spatial structure of chemical species; structural features of liquids, solutions, surfaces, supramolecular systems, nano- and solid materials; and the crystal structure of solids.